package JSE_01.StringBuilder.demo01;

public class Demo01 {
    public static void main(String[] args) {
        StringBuilder bul=new StringBuilder();
        System.out.println("bul"+bul);
        System.out.println("===============");
        StringBuilder bul2=new StringBuilder("你好");
        System.out.println("bul2:"+bul2);
    }
}
